''How does it work?'' Jack asks when he opens his present - a mobile phone. Later that night, Jack is a prisoner in a taxi in the empty streets of the dark city. He now tries his mobile phone for the first time. Can it save his life? Books, Reference and Language, Oxford Bookworms Library, New Edition: Starter Level (250 headwords) Taxi of Terror: THRILLER and ADVENTURE Books>Reference and Language, Oxford University Press